Numerical Simulation Study on Construction Effect of Top-Down Construction Method of Suspended Diaphragm Wall for Deep and Large Foundation Pit in Complex Stratum

Table 1

Material parameters of soil layer.

Number	Layer	Layer thickness (m)	Compression modulus (MPa)	Poisson’s ratio	Unit weight (kN/m^3)	Cohesion (kPa)	Internal friction angle (^°)
①	Silt 1	18	1.97	0.30	18	6.05	2.93
②	Silt 2	14	2.09	0.30	15	6.38	3.11
③	Clay 1	14.8	2.98	0.40	20	10.23	3.10
④	Clay 2	3.18	3.80	0.35	18	12.45	7.58
⑤	Tuff	1.65	500.00	0.30	23	20.00	33.00